They say that DJ Station is open

[goji]

As you reserve the right to decide which laws to break yourself, it's only fair that others should decide for themselves which laws they break. Assuming non-consenting third parties are not harmed.
Some of the covid rules are about as ridiculous as the Kentucky example.

If this or any other venue in Bangkok is currently operating within the law and within the rules and so are the customers, then I have no argument about it. Are they?

Since you're the one judging them guilty, the onus is on you to check that first.

I'll give them the benefit of the doubt, applying the "innocent until proven guilty principle. So until proven otherwise, please consider the possibility that they might have obtained a restaurant license. Which would allow them to open legally.
I also presume mask wearing is not mandatory in restaurants, for obvious reasons. So that wouldn't be a problem either.

Also, I gather they check for proof of vaccination.